{"id":"CVE-2025-10149","kind":"vulnerability","aliases":["CVE-2025-10149"],"related":[],"title":"SCIM endpoint lets federated users act on same-named local accounts","description":"The SCIM endpoint does not sufficiently validate authorization for federated users when performing operations against the local user store. This occurs when a local and a federated user share the same username, allowing a federated user to perform actions intended for a local user, including arbitrary operations.\n\nA malicious actor authenticated as a federated user may perform arbitrary operations on local user accounts via the SCIM 2.0 or SCIM 1.1 endpoints when local and federated users share the same username. This could lead to user account takeover. Deployments that do not support user self-registration are considered medium severity.","summary":"When a local user and a federated user share a username, the SCIM 2.0 and SCIM 1.1 endpoints fail to check that a federated user is allowed to touch the local account. An authenticated federated user can therefore run arbitrary operations on local accounts, which can lead to account takeover.","severity":"high","cvss":8.2,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["federation","other","scim","self-hosted"],"not_affected_if":["no-federated-login","scim-disabled"],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-19T17:16:59+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-25T03:04:17+00:00","updated_at":"2026-10-25T03:04:17+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-25T03:04:17Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"SCIM endpoint lets federated users act on same-named local accounts","impact":"high","summary":"When a local user and a federated user share a username, the SCIM 2.0 and SCIM 1.1 endpoints fail to check that a federated user is allowed to touch the local account. An authenticated federated user can therefore run arbitrary operations on local accounts, which can lead to account takeover.","category":"other","nicknames":[],"who_cares":["scim","federation","self-hosted"],"confidence":0.5,"needs_auth":"yes","worst_case":"Attacker takes over local user accounts via federated identity","analyst_note":"Identify the affected product and versions from the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2025-10149); sources did not name the product, so check and fix steps are unknown.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["no-federated-login","scim-disabled"],"who_is_affected":"Deployments that accept federated logins and also expose the SCIM endpoint while holding local user accounts that share usernames with federated identities. The sources say deployments that do not support user self-registration are considered medium severity, so self-registration status matters for risk. Deployments without federation or without SCIM enabled are not described as exposed.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000586,"input_tokens":3391,"output_tokens":493,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-10149':15A,18A '-2025':14A,17A '1.1':41B,144C '2.0':38B,141C 'account':12A,56B,68B,73B,137C,160C 'act':6A 'action':113C 'actor':124C 'allow':51B,107C 'arbitrari':64B,120C,132C 'authent':58B,125C 'author':82C 'check':45B 'consid':172C 'could':156C 'cve':13A,16A 'deploy':162C 'endpoint':2A,42B,77C,145C 'fail':43B 'feder':4A,19B,31B,48B,59B,84C,101C,109C,128C,149C 'host':24B 'includ':119C 'intend':114C 'lead':71B,157C 'let':3A 'local':11A,27B,55B,67B,91C,98C,117C,135C,147C 'malici':123C 'may':130C 'medium':173C 'name':10A 'occur':95C 'oper':65B,88C,121C,133C 'perform':87C,112C,131C 'registr':170C 'run':63B 'same-nam':8A 'scim':1A,21B,37B,40B,76C,140C,143C 'self':23B,169C 'self-host':22B 'self-registr':168C 'sever':174C 'share':33B,103C,151C 'store':93C 'suffici':80C 'support':166C 'takeov':74B,161C 'therefor':62B 'touch':53B 'user':5A,28B,32B,49B,60B,85C,92C,102C,110C,118C,129C,136C,150C,159C,167C 'usernam':35B,106C,154C 'valid':81C 'via':138C","nicknames":[],"mitigations":[],"who_affected":"Deployments that accept federated logins and also expose the SCIM endpoint while holding local user accounts that share usernames with federated identities. The sources say deployments that do not support user self-registration are considered medium severity, so self-registration status matters for risk. Deployments without federation or without SCIM enabled are not described as exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T17:16:59+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","cvss_by":"ed10eef1-636d-4fbe-9993-6890dfa878f8","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2025-10149","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-10149","severity":null,"published_at":"2026-10-19T17:16:59+00:00","modified_at":"2026-10-20T20:17:10+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","fetched_at":"2026-10-23T22:28:57+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}